<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        /* table,th,td{}分组选择器*/
        table,th,td{
            border: 10px solid #333;
        }
        table{
            width: 700px;
            /*core border-collapse边框折叠*/
            border-collapse: collapse;
            line-height: 50px;
            text-align: center;
        }
    </style>
</head>
<body>
    <table>
        <thead>
            <!--table row 表格的行-->
          <tr>
              <!--table head 表格的行标题-->
             <th>商城</th><th>手机</th>
          </tr>
       </thead>  
       <tbody>
           <tr>
               <!--table data-->
               <td>Tmail</td><td>苹果</td>
           </tr>
           <tr>
               <td>淘宝</td><td>华为</td>
           </tr>
       </tbody>
    </table>
</body>
</html>